John,

I'm not sure I understand your setup - are these mailers processing mail
one after another? There is only one 'Received' header field in your sample.

amavisd-new removes all previous X-Spam-* headers from a message
if it is doing spam checking by itself. This is to protect recipients from
acting on such header fields inserted by untrustworthy foreign mailers.
If you have two amavisd-s in a chain, the second one will remove
X-Spam-* headers fields inserted by previous ones.


Gary,
> The $sa_tag_level_deflt only affects the X-Spam type headers. You can
> safely include these headers in every mail, spam or not by setting:
> $sa_tag_level_deflt = undef;
> which for this particular setting means 'lower than any possible score'.

This is only true for amavisd-new-2.0 or later;
from 2.0 release notes:
- if tag level turns out to be undef, it will not be shown in X-Spam-*
  header fields, and will be interpreted as having a value lower than any
  spam score when deciding whether to insert X-Spam-* header fields or not;

with 20030616 or older undefined tag_level is treated as 0.

  Mark


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